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sehdev singh
Active Contributor

Join Date: Jun 2012
Posts: 11

Calculation of KWH Reading of Energy Meter

06/29/2012 10:34 AM

hello everybody, i have a energy meter rated PT-66kv/110v,CT-200/1A,accuracy class0.5 and multiplt factor-1000 export type connected on 66kv feeder having CT Ratio 100-200-400/1A .what will happen to the kWH reading if i connected this meter to the 400/1A for the calculation of units consumed in the feeder.if i multiply it by 2000 to get the correct reading of the unit consumed.as the meter is design on the CT ratio -200/1A.please tell me about this.
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TonyS
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United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#1

Re: Calculation of KWH Reading of Energy Meter

06/29/2012 11:48 PM

Could I ask why you would want to do this?

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sehdev singh
Active Contributor

Join Date: Jun 2012
Posts: 11
#2
In reply to #1

Re: Calculation of KWH Reading of Energy Meter

06/30/2012 12:35 AM

i want this because i connect the energy meter in the grid station on the 66kv out going feeder on 400/1A
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harry potter
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Join Date: Nov 2008
Location: India
Posts: 333
Good Answers: 6
#3
In reply to #2

Re: Calculation of KWH Reading of Energy Meter

07/01/2012 11:16 AM

Simple formula you can apply to calculate the Multiplication factor of meter system

Multiplication factor for KWH = CT ratio of line * PT ratio of line

___________________________ * scale factor of meter

meter CTR * meter PTR

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sehdev singh
Active Contributor

Join Date: Jun 2012
Posts: 11
#4
In reply to #3

Re: Calculation of KWH Reading of Energy Meter

07/02/2012 12:16 AM

please illustrate this formula with the help of example so that i can understand this properly, i will be very grateful to you for helping this.

with regards

sehdev singh
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harry potter (1); sehdev singh (2); TonyS (1)

Previous in Forum: AVR Design for 3 Phase Generator 50kva   Next in Forum: Heat Sinking an LM338T Voltage Regulator

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